National College of Computer Studies (NCCS)
1st Class Test (2008)
SET A
BIM/Fourth Semester / ITC 220: Computer Organization
1. Attempt all questions (5×1=5)
a. Give the excitation table for JK, SR, T and D flip flops.
b. Perform the arithmetic operation: (– 42) – (–13) in binary, using signed 2’s complement representation for negative numbers.
c. What is instruction mapping?
d. Give the truth table for 2 4 decoder.
e. Explain Indirect register addressing with figure.
Attempt any three questions: (3×5=15)
2. Along with the control functions, give the micro operations for the fetch, decode, EA calculation and execution of AND instruction.
3. With the help of figure, explain input output operation in basic computer.
4. What is micro programmed control unit? Give the microinstruction format and explain its different field.
5. Draw the well labelled flow chart for instruction cycle.
National College of Computer Studies (NCCS)
1st Class Test (2008)
SET B
BIM/Fourth Semester / ITC 220: Computer Organization
1. Attempt all questions (5×1=5)
a. Construct the logic circuit for the expression: .
b. Perform the arithmetic operation: (– 63) – (+13) in binary, using signed 2’s complement representation for negative numbers.
c. Differentiate between conditional branch and unconditional branch.
d. What is the size of memory that can be addressed by 14 bit address and each memory location can store 1 byte of information?
e. Explain Indirect memory addressing with figure.
Attempt any three questions (3×5=15)
2. With the help of instruction format, explain three types of instruction for basic computer.
3. Along with the control functions, give the microoperations for the fetch, decode, EA calculation and execution of STA instruction.
4. What is the advantage of using microprogrammed control unit over hardwired control unit? Give the microinstruction format and explain its different field.
5. Draw the well labelled flow chart for interrupt cycle.
National College of Computer Studies (NCCS)
1st Class Test (2008)
SET B
BIM/Fourth Semester / ITC 220: Computer Organization
1. Attempt all questions (5×1=5)
a. Construct the logic circuit for the expression: .
b. Perform the arithmetic operation: (– 63) – (+13) in binary, using signed 2’s complement representation for negative numbers.
c. Differentiate between conditional branch and unconditional branch.
d. What is the size of memory that can be addressed by 14 bit address and each memory location can store 1 byte of information?
e. Explain Indirect memory addressing with figure.
Attempt any three questions (3×5=15)
2. With the help of instruction format, explain three types of instruction for basic computer.
3. Along with the control functions, give the microoperations for the fetch, decode, EA calculation and execution of STA instruction.
4. What is the advantage of using microprogrammed control unit over hardwired control unit? Give the microinstruction format and explain its different field.
5. Draw the well labelled flow chart for interrupt cycle.
